This pant is so warm than expected. I bought it for my Mum. My mum is 162cm tall, and 140 pounds. She like to ware relax, so I choose M for her. She said , so great item. Because she always ware it to hiking outdoors. So I thank that item to protect my Mum from cold. You know, outside temprature is -10.

Wonderful, like wearing a sleeping bag (in a good, soft, warm way). The pants seem a little small for putting on over other clothing, which is what they are designed for. I am also not sure about how well they'd stand up to friction. So - walking the dog at night during the winter: YES, this and only this. Horseback riding in the middle of winter: afraid to risk given the material.

The Arcteryx Atom LT pants are great for what they were designed to do i.e. keep you warm when your sitting at camp not moving. There made to be used like any thing else in a best layering system. So when used right the Atom LT pants kick some serious ass. Best insulated pants on the market.

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